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LM5020 Datasheet(PDF) 3 Page - Texas Instruments

No. de pieza LM5020
Descripción Electrónicos  100V Current Mode PWM Controller
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Fabricante Electrónico  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
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LM5020 Datasheet(HTML) 3 Page - Texas Instruments

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LM5020
www.ti.com
SNVS275F – MAY 2004 – REVISED APRIL 2006
Pin Descriptions (continued)
Pin
Name
Description
Application Information
8
CS
Current Sense input
Current sense input for current mode control and over-
current protection. Current limiting is accomplished using a
dedicated current sense comparator. If the CS pin voltage
exceeds 0.5V the OUT pin switches low for cycle-by-cycle
current limiting. CS is held low for 50ns after OUT switches
high to blank leading edge current spikes.
9
RT / SYNC
Oscillator timing resistor pin and synchronization
An external resistor connected from RT to GND sets the
input
oscillator frequency. This pin also accepts synchronization
pulses from an external clock.
10
SS
Softstart Input
An external capacitor and an internal 10µA current source
set the soft-start ramp rate.
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
Absolute Maximum Ratings
(1)
VIN to GND
-0.3V to 100V
VCC to GND
-0.3V to 16V
RT to GND
-0.3V to 5.5V
All other pins to GND
-0.3V to 7V
Power Dissipation
Internally Limited
ESD Rating(2)
Human Body Model
2kV
Storage Temperature
-65°C to +150°C
Junction Temperature
150°C
(1)
Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which
operation of the device is intended to be functional. For guaranteed specifications and test conditions, see the Electrical Characteristics.
(2)
The human body model is a 100 pF capacitor discharged through a 1.5k
Ω resistor.
Operating Ratings
VIN Voltage
13V to 90V
External Voltage applied to VCC
8V to 15V
Operating Junction Temperature
-40°C to +125°C
Copyright © 2004–2006, Texas Instruments Incorporated
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